Mirion Technologies, Inc.
MIR- Exchange
- NYSE
- Industry
- Measuring & Controlling Devices, NEC
- SEC CIK
- 0001809987
In the last 90 days, Mirion Technologies, Inc. insiders filed 1 open-market purchase and 0 sales; 351 institutions reported holding it in 13F filings for Q2 2026, worth $4.70B in total; Maverick Capital is the only superinvestor holding it.
13F holders, Q4 2025
Institutional positions in Mirion Technologies, Inc. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 365
- +26 vs. Q3 2025
- Shares held
- 252.2M
- −2.75M (−1.1%) vs. Q3 2025
- Total value
- $5.91B
- −$22.0M (−0.4%) vs. Q3 2025
- New holders
- 82
- 147 more added
- Sold out
- 56
- 94 more reduced
4 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MIR on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 351 | $4.70B |
| Q1 2026 | 362 | $4.71B |
| Q4 2025 | 365 | $5.91B |
| Q3 2025 | 343 | $5.93B |
| Q2 2025 | 302 | $4.46B |
| Q1 2025 | 230 | $2.69B |
| Q4 2024 | 224 | $3.38B |
| Q3 2024 | 176 | $2.27B |
| Q2 2024 | 155 | $2.12B |
| Q1 2024 | 143 | $2.14B |
| Q4 2023 | 125 | $1.93B |
| Q3 2023 | 127 | $1.40B |
| Q2 2023 | 124 | $1.53B |
| Q1 2023 | 117 | $1.45B |
| Q4 2022 | 119 | $1.01B |
| Q3 2022 | 121 | $1.27B |
| Q2 2022 | 115 | $921.8M |
| Q1 2022 | 108 | $1.20B |
| Q4 2021 | 93 | $1.52B |
| Q3 2021 | 4 | $16.4M |
| Q2 2021 | 1 | $20.8K |
| Q1 2021 | 0 | $0 |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Mirion Technologies, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Pier Capital, LLC | 717,392 | $16.8M | 2.68% | −77,434−9.7% | Reduced |
| Axiom Investors LLC | 721,496 | $16.9M | 0.15% | +149,206+26.1% | Added |
| Nomura Holdings Inc | 760,733 | $17.8M | 0.05% | +33,771+4.6% | Added |
| Select Equity Group, L.P. | 769,033 | $18.0M | 0.08% | −372,231−32.6% | Reduced |
| Schwartz Investment Counsel Inc | 794,300 | $18.6M | 0.65% | −60,000−7.0% | Reduced |
| Stephens Investment Management Group LLC | 809,943 | $19.0M | 0.25% | +809,943 | New |
| Silvercrest Asset Management Group LLC | 818,244 | $19.2M | 0.13% | −246,553−23.2% | Reduced |
| Price T Rowe Associates Inc | 834,330 | $19.5M | 0.00% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 848,570 | $19.9M | 0.03% | +803,607+1,787.3% | Added |
| Troluce Capital Advisors LLC | 850,000 | $19.9M | 14.70% | +850,000 | New |
| Nomura Asset Management International Inc. | 854,745 | $20.0M | 0.03% | +854,745 | New |
| Public Sector Pension Investment Board | 857,684 | $20.1M | 0.07% | −98,476−10.3% | Reduced |
| Wells Fargo & Company | 870,256 | $20.4M | 0.00% | +524,329+151.6% | Added |
| Voya Investment Management LLC | 879,850 | $20.6M | 0.02% | +837,354+1,970.4% | Added |
| BNP Paribas Arbitrage, SA | 904,229 | $21.2M | 0.01% | +686,278+314.9% | Added |
| Davidson Kempner Capital Management LP | 928,513 | $21.7M | 0.32% | +853,513+1,138.0% | Added |
| TimesSquare Capital Management, LLC | 967,261 | $22.7M | 0.34% | −46,078−4.5% | Reduced |
| Corsair Capital Management, L.P. | 982,419 | $23.0M | 3.81% | −63,378−6.1% | Reduced |
| Jennison Associates LLC | 992,583 | $23.2M | 0.01% | −58,911−5.6% | Reduced |
| Schroder Investment Management Group | 1,011,014 | $24.0M | 0.02% | −157,694−13.5% | Reduced |
| Allspring Global Investments Holdings, LLC | 1,030,230 | $24.6M | 0.04% | +462,643+81.5% | Added |
| Arrowstreet Capital, Limited Partnership | 1,071,340 | $25.1M | 0.01% | −930,518−46.5% | Reduced |
| Emerald Advisers, LLC | 1,137,146 | $26.6M | 0.82% | −190.0% | Reduced |
| Rockefeller Capital Management L.P. | 1,139,037 | $26.7M | 0.05% | +167,454+17.2% | Added |
| Segall Bryant & Hamill, LLC | 1,169,689 | $27.4M | 0.37% | +53,591+4.8% | Added |
| Vaughan Nelson Investment Management, L.P. | 1,332,550 | $31.2M | 0.31% | +1,332,550 | New |
| Bank of America Corp | 1,358,870 | $31.8M | 0.00% | −60,882−4.3% | Reduced |
| Alyeska Investment Group, L.P. | 1,531,217 | $35.9M | 0.10% | −1,596,528−51.0% | Reduced |
| Raymond James Financial Inc | 1,534,819 | $36.3M | 0.01% | −196,387−11.3% | Reduced |
| Brown Advisory Inc | 1,613,051 | $37.8M | 0.05% | −1,108,732−40.7% | Reduced |
| Citadel Advisors LLC | 1,620,793 | $38.0M | 0.03% | +1,430,949+753.7% | Added |
| Chescapmanager LLC | 1,659,137 | $38.9M | 6.41% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 1,670,064 | $39.1M | 0.00% | +1,431,724+600.7% | Added |
| Principal Financial Group Inc | 1,707,659 | $40.0M | 0.02% | +306,407+21.9% | Added |
| Franklin Resources Inc | 1,877,123 | $44.0M | 0.01% | +837,056+80.5% | Added |
| Conestoga Capital Advisors, LLC | 1,938,849 | $45.4M | 0.76% | +587,064+43.4% | Added |
| Artemis Investment Management LLP | 1,971,711 | $46.2M | 0.56% | +1,018,304+106.8% | Added |
| Nuveen, LLC | 2,012,912 | $47.1M | 0.01% | +423,209+26.6% | Added |
| Morgan Stanley | 2,096,858 | $49.1M | 0.00% | +782,951+59.6% | Added |
| Lord, Abbett & Co. LLC | 2,143,558 | $50.2M | 0.15% | −144,624−6.3% | Reduced |
| Royal Bank of Canada | 2,147,984 | $50.3M | 0.01% | −162,266−7.0% | Reduced |
| Driehaus Capital Management LLC | 2,299,122 | $53.8M | 0.37% | +311,253+15.7% | Added |
| Northern Trust Corp | 2,331,446 | $54.6M | 0.01% | −18,340−0.8% | Reduced |
| Ameriprise Financial Inc | 2,336,310 | $54.7M | 0.01% | +619,118+36.1% | Added |
| Charles Schwab Investment Management Inc | 2,344,241 | $54.9M | 0.01% | +109,614+4.9% | Added |
| TCW Group Inc | 2,452,579 | $57.4M | 0.41% | +2,452,579 | New |
| American Century Companies Inc | 2,556,724 | $59.9M | 0.03% | −672,814−20.8% | Reduced |
| Hood River Capital Management LLC | 2,780,137 | $65.1M | 0.71% | +16,853+0.6% | Added |
| Loomis Sayles & Co L P | 2,845,619 | $66.6M | 0.08% | +84,084+3.0% | Added |
| Two Creeks Capital Management, LP | 2,923,802 | $68.5M | 5.61% | −674,961−18.8% | Reduced |
| Bank of New York Mellon Corp | 3,076,945 | $72.1M | 0.01% | +1,716,020+126.1% | Added |
| Invesco Ltd. | 3,101,120 | $72.6M | 0.01% | +344,230+12.5% | Added |
| Swedbank AB | 3,398,200 | $79.6M | 0.08% | −607,000−15.2% | Reduced |
| Massachusetts Financial Services Co | 3,663,479 | $85.8M | 0.03% | −1,728,293−32.1% | Reduced |
| Dimensional Fund Advisors LP | 4,102,558 | $96.1M | 0.02% | −2,104,375−33.9% | Reduced |
| Janus Henderson Group PLC | 4,596,949 | $107.7M | 0.05% | −3,064,988−40.0% | Reduced |
| UBS Group AG | 4,852,587 | $113.6M | 0.02% | +55,754+1.2% | Added |
| Goldman Sachs Group Inc | 5,248,506 | $122.9M | 0.02% | +193,914+3.8% | Added |
| Geode Capital Management, LLC | 5,786,596 | $135.5M | 0.01% | +157,687+2.8% | Added |
| Cooperman Leon G | 8,383,441 | $196.3M | 6.51% | 00.0% | Unchanged |
| FMR LLC | 8,414,300 | $197.1M | 0.01% | −664,001−7.3% | Reduced |
| State Street Corp | 9,198,795 | $215.4M | 0.01% | +382,449+4.3% | Added |
| T. Rowe Price Investment Management, Inc. | 15,112,855 | $353.9M | 0.22% | −6,453,787−29.9% | Reduced |
| Vanguard Group Inc | 30,346,328 | $710.7M | 0.01% | −71,999−0.2% | Reduced |
| BlackRock, Inc. | 38,199,968 | $894.6M | 0.02% | +1,769,477+4.9% | Added |
| Maverick Capital LtdSuperinvestorMaverick Capital | 0 | $0 | 0.00% | −2,588,579−100.0% | Sold out |
| Yaupon Capital Management LP | 0 | $0 | 0.00% | −525,000−100.0% | Sold out |
| Millennium Management LLC | 0 | $0 | 0.00% | −521,021−100.0% | Sold out |
| Bornite Capital Management LP | 0 | $0 | 0.00% | −500,000−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −388,894−100.0% | Sold out |
| Kingdon Capital Management, L.L.C. | 0 | $0 | 0.00% | −375,000−100.0% | Sold out |
| Pinnbrook Capital Management LP | 0 | $0 | 0.00% | −335,070−100.0% | Sold out |
| Great West Life Assurance Co | 0 | $0 | 0.00% | −324,608−100.0% | Sold out |
| Fortress Investment Group LLC | 0 | $0 | 0.00% | −302,431−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −298,500−100.0% | Sold out |
| Maven Securities LTD | 0 | $0 | 0.00% | −275,000−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −202,331−100.0% | Sold out |
| Zimmer Partners, LP | 0 | $0 | 0.00% | −200,000−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −155,000−100.0% | Sold out |
| Element Capital Management LLC | 0 | $0 | 0.00% | −115,578−100.0% | Sold out |
| Macquarie Group Ltd | 0 | $0 | 0.00% | −114,724−100.0% | Sold out |
| Concentric Capital Strategies, LP | 0 | $0 | 0.00% | −114,483−100.0% | Sold out |
| Polar Asset Management Partners Inc. | 0 | $0 | 0.00% | −105,000−100.0% | Sold out |
| Monashee Investment Management LLC | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| Ovata Capital Management Ltd | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| Jackson Creek Investment Advisors LLC | 0 | $0 | 0.00% | −93,843−100.0% | Sold out |
| Freestone Grove Partners LP | 0 | $0 | 0.00% | −77,415−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −55,760−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −49,910−100.0% | Sold out |
| Hel Ved Capital Management Ltd | 0 | $0 | 0.00% | −49,800−100.0% | Sold out |
| Wolverine Asset Management LLC | 0 | $0 | 0.00% | −49,359−100.0% | Sold out |
| Fund 1 Investments, LLC | 0 | $0 | 0.00% | −43,900−100.0% | Sold out |
| IMC-Chicago, LLC | 0 | $0 | 0.00% | −42,689−100.0% | Sold out |
| Groupama Asset Managment | 0 | $0 | 0.00% | – | Sold out |
| Teacher Retirement System of Texas | 0 | $0 | 0.00% | −27,885−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −27,771−100.0% | Sold out |
| Polymer Capital Management (US) LLC | 0 | $0 | 0.00% | −27,682−100.0% | Sold out |
| SummitTX Capital, L.P. | 0 | $0 | 0.00% | −25,482−100.0% | Sold out |
| Mackenzie Financial Corp | 0 | $0 | 0.00% | −24,289−100.0% | Sold out |
| Axq Capital, LP | 0 | $0 | 0.00% | −16,795−100.0% | Sold out |